9.8

CVE-2026-4176: perl

CVSS: 9.8v3.1CriticalAnalyzed
AliasesALPINE-CVE-2026-4176UBUNTU-CVE-2026-4176DEBIAN-CVE-2026-4176
Published 29-03-2026Last modified 30-03-2026
Open JSON

Vulnerability summary

CVE-2026-4176 is a critical (CVSS 9.8) vulnerability in perl. EPSS estimates a 0.81% chance of exploitation in the next 30 days, higher than 56.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.81%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-PPV9-MJQF-C9X4

Timeline

  1. 29-03-2026
    PublishedVulnerability first disclosed.
  2. 30-03-2026
    Last modifiedVulnerability information updated.

Description

Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a vulnerable version of Compress::Raw::Zlib. Compress::Raw::Zlib is included in the Perl package as a dual-life core module, and is vulnerable to CVE-2026-3381 due to a vendored version of zlib which has several vulnerabilities, including CVE-2026-27171. The bundled Compress::Raw::Zlib was updated to version 2.221 in Perl blead commit c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.81%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

+0.08 pp

From 0.73% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.81%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard2 products
  • miniperl< 5.42.2-r0
  • perl< 5.42.2-r0
Wolfi2 products
  • miniperl< 5.42.2-r0
  • perl< 5.42.2-r0
Alpine1 product
  • perl≥ 5.9.4, < 5.42.2-r0
Debian1 product
  • perl< 5.10.0-21
Perl1 product
  • perl≥ 5.9.4, < 5.40.4 | ≥ 5.41.0, < 5.42.2 | ≥ 5.43.0, < 5.43.9
Shay1 product
  • perl≥ 5.9.4, < 5.40.4-RC1 | ≥ 5.41.0, < 5.42.2-RC1 | ≥ 5.43.0, < 5.43.9
Ubuntu1 product
  • perlAll versions (No fix recorded)

7 vendors · 9 products

References

16 links
Show all 16 references